Nice video, but I'm afraid it is a bit of an old-fashioned fantasy. It would be nice to think that our beloved analog mixers and direct conversion receivers still have a place in the SDR world. That may have been true a few years ago when we were using soundcard-based SDRs. But today we just put an Analog to Digital Converter at the antenna, do "Direct Sampling," create a digital stream, and sent it to the CPU for processing, right?
Sometimes we think that we can show younger people how our older tech (Direct Conversion receivers) is STILL relevant in the age of SDR radio. But I can just hear them scoffing at this notion, pointing out that I,Q-to-soundcard front ends have gone the way of the dinosaurs, and all we need now is an ADC and a CPU.
But hey, I am an HDR guy. Am I missing something here?
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As someone who lives less than a mile from an FM broadcast site I can say that in my experience direct sampling SDRs do require some form of bandpass/reject filtering.
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